OK, let's work through this together. We're starting with 671 and we're going to multiply it by 152, which means we add 671 to itself 152 times.
Step 1: 0 + 671 = 671
Step 2: 671 + 671 = 1342
Step 3: 1342 + 671 = 2013
Step 4: 2013 + 671 = 2684
Step 5: 2684 + 671 = 3355
Step 6: 3355 + 671 = 4026
Step 7: 4026 + 671 = 4697
Step 8: 4697 + 671 = 5368
Step 9: 5368 + 671 = 6039
Step 10: 6039 + 671 = 6710
Step 11: 6710 + 671 = 7381
Step 12: 7381 + 671 = 8052
Step 13: 8052 + 671 = 8723
Step 14: 8723 + 671 = 9394
Step 15: 9394 + 671 = 10065
Step 16: 10065 + 671 = 10736
Step 17: 10736 + 671 = 11407
Step 18: 11407 + 671 = 12078
Step 19: 12078 + 671 = 12749
Step 20: 12749 + 671 = 13420
Step 21: 13420 + 671 = 14091
Step 22: 14091 + 671 = 14762
Step 23: 14762 + 671 = 15433
Step 24: 15433 + 671 = 16104
Step 25: 16104 + 671 = 16775
Step 26: 16775 + 671 = 17446
Step 27: 17446 + 671 = 18117
Step 28: 18117 + 671 = 18788
Step 29: 18788 + 671 = 19459
Step 30: 19459 + 671 = 20130
Step 31: 20130 + 671 = 20801
Step 32: 20801 + 671 = 21472
Step 33: 21472 + 671 = 22143
Step 34: 22143 + 671 = 22814
Step 35: 22814 + 671 = 23485
Step 36: 23485 + 671 = 24156
Step 37: 24156 + 671 = 24827
Step 38: 24827 + 671 = 25498
Step 39: 25498 + 671 = 26169
Step 40: 26169 + 671 = 26840
Step 41: 26840 + 671 = 27511
Step 42: 27511 + 671 = 28182
Step 43: 28182 + 671 = 28853
Step 44: 28853 + 671 = 29524
Step 45: 29524 + 671 = 30195
Step 46: 30195 + 671 = 30866
Step 47: 30866 + 671 = 31537
Step 48: 31537 + 671 = 32208
Step 49: 32208 + 671 = 32879
Step 50: 32879 + 671 = 33550
Step 51: 33550 + 671 = 34221
Step 52: 34221 + 671 = 34892
Step 53: 34892 + 671 = 35563
Step 54: 35563 + 671 = 36234
Step 55: 36234 + 671 = 36905
Step 56: 36905 + 671 = 37576
Step 57: 37576 + 671 = 38247
Step 58: 38247 + 671 = 38918
Step 59: 38918 + 671 = 39589
Step 60: 39589 + 671 = 40260
Step 61: 40260 + 671 = 40931
Step 62: 40931 + 671 = 41602
Step 63: 41602 + 671 = 42273
Step 64: 42273 + 671 = 42944
Step 65: 42944 + 671 = 43615
Step 66: 43615 + 671 = 44286
Step 67: 44286 + 671 = 44957
Step 68: 44957 + 671 = 45628
Step 69: 45628 + 671 = 46299
Step 70: 46299 + 671 = 46970
Step 71: 46970 + 671 = 47641
Step 72: 47641 + 671 = 48312
Step 73: 48312 + 671 = 48983
Step 74: 48983 + 671 = 49654
Step 75: 49654 + 671 = 50325
Step 76: 50325 + 671 = 50996
Step 77: 50996 + 671 = 51667
Step 78: 51667 + 671 = 52338
Step 79: 52338 + 671 = 53009
Step 80: 53009 + 671 = 53680
Step 81: 53680 + 671 = 54351
Step 82: 54351 + 671 = 55022
Step 83: 55022 + 671 = 55693
Step 84: 55693 + 671 = 56364
Step 85: 56364 + 671 = 57035
Step 86: 57035 + 671 = 57706
Step 87: 57706 + 671 = 58377
Step 88: 58377 + 671 = 59048
Step 89: 59048 + 671 = 59719
Step 90: 59719 + 671 = 60390
Step 91: 60390 + 671 = 61061
Step 92: 61061 + 671 = 61732
Step 93: 61732 + 671 = 62403
Step 94: 62403 + 671 = 63074
Step 95: 63074 + 671 = 63745
Step 96: 63745 + 671 = 64416
Step 97: 64416 + 671 = 65087
Step 98: 65087 + 671 = 65758
Step 99: 65758 + 671 = 66429
Step 100: 66429 + 671 = 67100
Step 101: 67100 + 671 = 67771
Step 102: 67771 + 671 = 68442
Step 103: 68442 + 671 = 69113
Step 104: 69113 + 671 = 69784
Step 105: 69784 + 671 = 70455
Step 106: 70455 + 671 = 71126
Step 107: 71126 + 671 = 71797
Step 108: 71797 + 671 = 72468
Step 109: 72468 + 671 = 73139
Step 110: 73139 + 671 = 73810
Step 111: 73810 + 671 = 74481
Step 112: 74481 + 671 = 75152
Step 113: 75152 + 671 = 75823
Step 114: 75823 + 671 = 76494
Step 115: 76494 + 671 = 77165
Step 116: 77165 + 671 = 77836
Step 117: 77836 + 671 = 78507
Step 118: 78507 + 671 = 79178
Step 119: 79178 + 671 = 79849
Step 120: 79849 + 671 = 80520
Step 121: 80520 + 671 = 81191
Step 122: 81191 + 671 = 81862
Step 123: 81862 + 671 = 82533
Step 124: 82533 + 671 = 83204
Step 125: 83204 + 671 = 83875
Step 126: 83875 + 671 = 84546
Step 127: 84546 + 671 = 85217
Step 128: 85217 + 671 = 85888
Step 129: 85888 + 671 = 86559
Step 130: 86559 + 671 = 87230
Step 131: 87230 + 671 = 87901
Step 132: 87901 + 671 = 88572
Step 133: 88572 + 671 = 89243
Step 134: 89243 + 671 = 89914
Step 135: 89914 + 671 = 90585
Step 136: 90585 + 671 = 91256
Step 137: 91256 + 671 = 91927
Step 138: 91927 + 671 = 92598
Step 139: 92598 + 671 = 93269
Step 140: 93269 + 671 = 93940
Step 141: 93940 + 671 = 94611
Step 142: 94611 + 671 = 95282
Step 143: 95282 + 671 = 95953
Step 144: 95953 + 671 = 96624
Step 145: 96624 + 671 = 97295
Step 146: 97295 + 671 = 97966
Step 147: 97966 + 671 = 98637
Step 148: 98637 + 671 = 99308
Step 149: 99308 + 671 = 99979
Step 150: 99979 + 671 = 100650
Step 151: 100650 + 671 = 101321
Step 152: 101321 + 671 = 101992

So, 671*152 = 101992